Abstract
The numerical experiments of the orographic-dynamic effects upon the large scale motion of the atmosphere are made by use of the 3-level primitive equation model, in which the pressure coordinate system is adopted for the vertical. The experiments for the simple flows result in good agreement with the theoretical linear solutions, when the relatively low mountains are included. However, the results in cases where the high mountains are included, show that the flows eventually turn around the obstacles rather than pass over them, resulting in relatively small amplitudes. Other experiments are made for the baroclinic flows and the various mountains. From these, it is seen that a stationary trough appears on the lee side of the mountains in connection with relatively strong winds over the high and wide mountain barriers.
